I had this problem a few weeks ago before E4 had been added to Freeview and since I have had little breakup and dropout problems. But since Friday I cannot get these channels to tune in at all. I've tried resetting the box (Sony VTX-D800U) and retuning a number of times but still nothing. Could it be the weather? I share a communal ariel in a block of flats so have no way of knowing if it's moved or been tampered with. Any ideas?